Risks of lung cancer in smokers who switch to filter cigarettes.
D003201:Computers; D005374:Filtration; D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control*; D008297:Male; D010947:Plants, Toxic; D011159:Population Surveillance; D012189:Retrospective Studies; D012907:Smoking; D013997:Time Factors; D014026:Nicotiana